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Implementation of jquery form submission error message prompt function

小云云

Jan 23, 2018 am 09:06 AM

This article mainly introduces examples of jquery form submission with error message prompt effect, which has a good reference value. Let's take a look at it with the editor. I hope it can help you better complete the jQuery form function.

Rendering:

html code:

    <form action="" method="" name="form2">
      <p class="m_t30 error_p2">
        <p>
          我是
          <select name="identity" id="ko" class="form-control">
<option></option>
<option value="investor">投资者</option>
<option value="developer">地产开发商</option>
          </select>
        </p>
        <p>
          <p class="error_p2"><i class="glyphicon glyphicon-info-sign"></i>注册错误信息</p>
        </p>
      </p>
      <p class="m_t10 error_p2">
        <p>
          <input type="text" class="form-control" name="name" placeholder="用户名">
        </p>
        <p>
          <p class="error_p2"><i class="glyphicon glyphicon-info-sign"></i>注册错误信息</p>
        </p>
      </p>
      <p class="m_t10 error_p2">
        <p>
          <input type="email" class="form-control" name="email" placeholder="电子邮箱">
        </p>
        <p>
          <p class="error_p2"><i class="glyphicon glyphicon-info-sign"></i>注册错误信息</p>
        </p>
      </p>
      <p class="m_t10 error_p2">
        <p>
          <input type="tel" class="form-control" name="phone" placeholder="手机">
        </p>
        <p>
          <p class="error_p2"><i class="glyphicon glyphicon-info-sign"></i>注册错误信息</p>
        </p>
      </p>
<p class="m_t10 error_p2">
        <p>
          <select name="country" class="form-control">
<option></option>
<option>国家或地区</option>
<option value="1">中国</option>
<option value="2">美国</option>
          </select>
        </p>
        <p>
          <p class="error_p2"><i class="glyphicon glyphicon-info-sign"></i>注册错误信息</p>
        </p>
      </p>
      <p class="m_t10 error_p2">
        <p>
          <select name="province" class="form-control">
<option></option>
<option>州/省</option>
<option value="1">广东</option>
<option value="2">加州</option>
          </select>
        </p>
        <p>
          <p class="error_p2"><i class="glyphicon glyphicon-info-sign"></i>注册错误信息</p>
        </p>
      </p>
      <p class="m_t10 error_p2">
        <p>
          <input type="password" class="form-control" name="pwd" placeholder="密码">
        </p>
        <p>
          <p class="error_p2"><i class="glyphicon glyphicon-info-sign"></i>注册错误信息</p>
        </p>
      </p>
      <p class="m_t10 error_p2">
        <p>
          <input type="password" class="form-control" name="pwd2" placeholder="再次确认密码">
        </p>
        <p>
          <p class="error_p2"><i class="glyphicon glyphicon-info-sign"></i>注册错误信息</p>
        </p>
      </p>
      <p class="m_t10">
        <p>
          <button class="btn btn_login" type="button" onclick="btn_register()">下一步</button>
        </p>
      </p>
    </form>

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css code:

<style>
  .m_t10 {
    margin-top: 20px;
  }
  .error_p2 {
    background-color: #FF6900;
    color: white;
    font-size: 10px;
    padding: 5px;
    border-radius: 5px;
    display: none;
  }
  .error_p2 i {
    margin-right: 5px;
  }
</style>

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js code

<!--注册错误判断form2-->
<script>
  //定义要提交的所有数据为一个数组validate2，并且全部赋值为false
  var validate2 = {
    identity: false,
    name: false,
    phone: false,
    email: false,
    country: false,
    province: false,
    mail: false,
    pwd: false,
    pwd2: false
  };
  var msg = ""; //定义提示信息
  //判断角色  
  $(&#39;select[name=identity]&#39;, form2).blur(function() {
    var identity = $(this).val();
    var span = $(this).parents(&#39;.error_p2&#39;).find(&#39;.error_p2&#39;);
    //判断用户名是否为空
    if(identity == &#39;&#39;) {
      msg = &#39;<i class="glyphicon glyphicon-exclamation-sign"></i>&#39; + "请输入您的身份";
      span.html(msg);
      span.css(&#39;display&#39;, &#39;inline&#39;);
      validate2.identity = false;
      return;
    } else {
      msg = "";
      span.css(&#39;display&#39;, &#39;none&#39;);
      validate2.identity = true;
      return;
    }
  })
  //      //判断用户名  
  $(&#39;input[name=name]&#39;, form2).blur(function() {
    var name = $(this).val();
    var span = $(this).parents(&#39;.error_p2&#39;).find(&#39;.error_p2&#39;);
    //判断用户名是否为空
    if(name == &#39;&#39;) {
      msg = &#39;<i class="glyphicon glyphicon-exclamation-sign"></i>&#39; + "请输入用户名";
      span.html(msg);
      span.css(&#39;display&#39;, &#39;inline&#39;);
      validate2.name = false;
      return;
    } else {
      msg = "";
      span.css(&#39;display&#39;, &#39;none&#39;);
      validate2.name = true;
      return;
    }
  })
  //判断手机
  $(&#39;input[name=phone]&#39;, form2).blur(function() {
    var phone = $(this).val();
    var span = $(this).parents(&#39;.error_p2&#39;).find(&#39;.error_p2&#39;);
    //判断用户名是否为空
    if(phone == &#39;&#39;) {
      msg = &#39;<i class="glyphicon glyphicon-exclamation-sign"></i>&#39; + "请输入手机号";
      span.html(msg);
      span.css(&#39;display&#39;, &#39;inline&#39;);
      validate2.phone = false;
      return;
    } else {
      msg = "";
      span.css(&#39;display&#39;, &#39;none&#39;);
      validate2.phone = true;
      return;
    }
  })
  //判断国家
  $(&#39;select[name=country]&#39;, form2).blur(function() {
    var country = $(this).val();
    var span = $(this).parents(&#39;.error_p2&#39;).find(&#39;.error_p2&#39;);
    //判断用户名是否为空
    if(country == &#39;&#39;) {
      msg = &#39;<i class="glyphicon glyphicon-exclamation-sign"></i>&#39; + "请输入国家";
      span.html(msg);
      span.css(&#39;display&#39;, &#39;inline&#39;);
      validate2.country = false;
      return;
    } else {
      msg = "";
      span.css(&#39;display&#39;, &#39;none&#39;);
      validate2.country = true;
      return;
    }
  })
  //判断省份
  $(&#39;select[name=province]&#39;, form2).blur(function() {
    var province = $(this).val();
    var span = $(this).parents(&#39;.error_p2&#39;).find(&#39;.error_p2&#39;);
    //判断用户名是否为空
    if(province == &#39;&#39;) {
      msg = &#39;<i class="glyphicon glyphicon-exclamation-sign"></i>&#39; + "请输入省或州";
      span.html(msg);
      span.css(&#39;display&#39;, &#39;inline&#39;);
      validate2.province = false;
      return;
    } else {
      msg = "";
      span.css(&#39;display&#39;, &#39;none&#39;);
      validate2.province = true;
      return;
    }
  })
  //判断邮政编码
  $(&#39;input[name=mail]&#39;, form2).blur(function() {
    var mail = $(this).val();
    var span = $(this).parents(&#39;.error_p2&#39;).find(&#39;.error_p2&#39;);
    //判断用户名是否为空
    if(mail == &#39;&#39;) {
      msg = &#39;<i class="glyphicon glyphicon-exclamation-sign"></i>&#39; + "请输邮政编码";
      span.html(msg);
      span.css(&#39;display&#39;, &#39;inline&#39;);
      validate2.mail = false;
      return;
    } else {
      msg = "";
      span.css(&#39;display&#39;, &#39;none&#39;);
      validate2.mail = true;
      return;
    }
  })
  //判断email
  $(&#39;input[name=email]&#39;, form2).blur(function() {
    var email = $(this).val();
    var reg = /\w+[@]{1}\w+[.]\w+/;
    var span = $(this).parents(&#39;.error_p2&#39;).find(&#39;.error_p2&#39;);
    if(email == &#39;&#39;) {
      msg = &#39;<i class="glyphicon glyphicon-exclamation-sign"></i>&#39; + "请填写邮箱";
      span.html(msg);
      span.css(&#39;display&#39;, &#39;inline&#39;);
      validate2.eamil = false;
      return;
    } else if(reg.test(email) == false) {
      msg = &#39;<i class="glyphicon glyphicon-exclamation-sign"></i>&#39; + "邮箱格式不正确";
      span.html(msg);
      span.css(&#39;display&#39;, &#39;inline&#39;);
      validate2.email = false;
      return;
    } else {
      msg = "";
      span.css(&#39;display&#39;, &#39;none&#39;);

      validate2.email = true;
      return;
    }
  })
  //判断密码  
  $(&#39;input[name=pwd]&#39;, form2).blur(function() {
    var pwd = $(this).val();
    var span = $(this).parents(&#39;.error_p2&#39;).find(&#39;.error_p2&#39;);
    //判断用户名是否为空
    if(pwd == &#39;&#39;) {
      msg = &#39;<i class="glyphicon glyphicon-exclamation-sign"></i>&#39; + "密码不能为空";
      span.html(msg);
      span.css(&#39;display&#39;, &#39;inline&#39;);
      validate2.pwd = false;
      return;
    } else {
      msg = "";
      span.css(&#39;display&#39;, &#39;none&#39;);
      validate2.pwd = true;
      return;
    }
  })
  //判断再次确认密码  
  $(&#39;input[name=pwd2]&#39;, form2).blur(function() {
    var pwd2 = $(this).val();
    var span = $(this).parents(&#39;.error_p2&#39;).find(&#39;.error_p2&#39;);
    //判断用户名是否为空
    if(pwd2 == &#39;&#39;) {
      msg = &#39;<i class="glyphicon glyphicon-exclamation-sign"></i>&#39; + "确认密码不能为空";
      span.html(msg);
      span.css(&#39;display&#39;, &#39;inline&#39;);
      validate2.pwd2 = false;
      return;
    } else if(pwd2 != $(&#39;input[name=pwd]&#39;, form2).val()) {
      msg = &#39;<i class="glyphicon glyphicon-exclamation-sign"></i>&#39; + "确认密码与密码不一致";
      span.html(msg);
      span.css(&#39;display&#39;, &#39;inline&#39;);
      validate2.pwd2 = false;
      return;
    } else {
      msg = "";
      span.css(&#39;display&#39;, &#39;none&#39;);
      validate2.pwd2 = true;
      return;
    }
  })
  //提交表单，isOK的值是所有提交信息的true，false判断，
  //只要有一个为false，isOK的值就是false，
  //isOK值为false的话就全部执行一次表单元素的失去焦点事件，从而提示错误信息
  //isOK值为true的话才提交表单。  
  //因为有些页面可能不止一个需要提交的表单或者有些表单元素的name重复，所以根据form name=".. "，来区分元素失去事件，这里是form2就是对应的<form name>
  function btn_register() {
    var isOK = validate2.identity && validate2.name && validate2.phone && validate2.email && validate2.mail && validate2.country && validate2.province && validate2.pwd && validate2.pwd2;
    var form2 = $(&#39;form[name=form2]&#39;);
    if(isOK) {
      //。。。执行提交事件
      form2.submit();
    } else {
      $(&#39;select[name=identity]&#39;, form2).trigger(&#39;blur&#39;);
      $(&#39;input[name=name]&#39;, form2).trigger(&#39;blur&#39;);
      $(&#39;input[name=phone]&#39;, form2).trigger(&#39;blur&#39;);
      $(&#39;input[name=email]&#39;, form2).trigger(&#39;blur&#39;);
      $(&#39;input[name=mail]&#39;, form2).trigger(&#39;blur&#39;);
      $(&#39;select[name=country]&#39;, form2).trigger(&#39;blur&#39;);
      $(&#39;select[name=province]&#39;, form2).trigger(&#39;blur&#39;);
      $(&#39;input[name=pwd]&#39;, form2).trigger(&#39;blur&#39;);
      $(&#39;input[name=pwd2]&#39;, form2).trigger(&#39;blur&#39;);
    }
  }
</script>

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Brief description:

  //执行对应表单元素的失去焦点事件$(&#39;input[name=XX]&#39;,formX).blur()
  //定义对应的参数来获取值，如:var pwd=$(this).val();
  //定义参数获取对应错误提示信息的标签元素对象，这里的是var span = $(this).parents(&#39;.error_p2&#39;).find(&#39;.error_p2&#39;);
  //简要说明.parents(&#39;&#39;)方法获取的是祖先元素为（&#39;.error_p2&#39;），看清楚有带"s"，简单来说如果.error_p2是当前元素的上三级$(&#39;this&#39;).parent().parent().parent()，而用$(&#39;this&#39;).parents(&#39;.error_p2&#39;)能一步到位获取到该元素对象，而find(&#39;&#39;)方法刚好相反，一步到位的获取对应后辈元素对象
  //然后就是根据条件判断，判断的正则表达式我就不一 一举例了（因为我也记不住那么多= =、），是否符合返回对应的数组元素true、false值，实现隐藏错误提示，并且给数组validate2的值赋值。
  //最后提交表单时，再次执行判断isOK是否为true
  //isOK值为false的话就全部执行一次表单元素的失去焦点事件，从而提示错误信息
  //isOK值为true的话才提交表单。
  //ps:表单里的button元素如果不是提交按钮，记得将type=“button”，否则默认是type=“submit”，点击就会提交;

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Last words:

The style and layout are not set up well, the page effect is not good, I am deeply sorry

As I said before, when writing jq, first think about which objects to obtain, what events to execute, and finally what element objects to achieve. Effectively, the parents and find methods are easy to use, but when using them, be sure to nest them well to achieve a holistic effect.

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